door speaker baffle question

going back to my post about adding 2 woofers in the door.

once i seal it off pretty good theres gonna be alot of presure inside the door that would have to go somewhere, and it will most definitely go thru the window seal and back at the door rattling the sht out of it.

so i was thinkin to make some type of vent or an outlet in the door jambs to relieve the pressure kinda like a port with some foam in it so the water doesnt get in while im driving.

since the sound gonna escape to the outside of the car i thought it would help decrease the dor vibrations so i dont have to add too much sound deadening